Frequencies for first 10,000 rows of enddate variable in vwhqi_readm_reduction 

   End Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  30jun1920 |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 16 Nov 2016